You build Drupal websites. You know which modules to download and configure and how to make a pretty slick website. You might be able to use Views to build up complex queries to add some fizz to sites that you build. You might be able to create various content types and image presets. You might even know the delights of Context, Panels, Rules etc. But you might be feeling like you want to go beyond downloading, installing and configuring modules. Do you seek more freedom to do what you want? Do you have problems to solve that require a finer touch than using existing modules? Or do you just want to increase your skill level? Here is why you should start Drupal module development.